Use of Double-Channel Heterostructures to Improve the Access Resistance and Linearity in GaN-Based HEMTs
Academic Article
Publication Date:
2006
Short description:
Use of Double-Channel Heterostructures to Improve the Access Resistance and Linearity in GaN-Based HEMTs / Palacios, T.; Chini, Alessandro; Buttari, D.; Heikman, S.; Chakraborty, A.; Keller, S.; Denbaars, S. P.; Mishra, U. K.. - In: IEEE TRANSACTIONS ON ELECTRON DEVICES. - ISSN 0018-9383. - STAMPA. - 53:3(2006), pp. 562-565. [10.1109/TED.2005.863767]
abstract:
Double-channel structures have been used in AlGaN/GaN high electron mobility transistors to reduce the access resistance. Carrier densities as high as 2.9×1013 cm-2 and mobilities in the 1300 cm2/V·s range have been obtained in the access region. Also, the correct design of the potential barrier between the different channels allowed tailoring the differential access resistance to enhance the linearity of the transistors. This increase in linearity has been measured as a flatter profile of the transconductance and cutoff frequency versus current and as an improvement of more than 2 dB in large-signal two-tone linearity measurements.
Iris type:
Articolo su rivista
Keywords:
Current gain cutoff frequency; gallium nitride (GaN); high-electron mobility transistor (HEMT); high-frequency performance; transconductance; two-tone linearity
List of contributors:
Palacios, T.; Chini, Alessandro; Buttari, D.; Heikman, S.; Chakraborty, A.; Keller, S.; Denbaars, S. P.; Mishra, U. K.
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